<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>webpack5</title>
</head>
<body>
<!-- <div>webpack</div>-->
<!-- <div id="less-container">less-container</div>-->
 <div class="page">pxtorem</div>
<!-- <input placeholder="请输入"/>-->
</body>

</html>
<script>
  let docEle = document.documentElement;
  function setRemUnit () {
    //750/10=75 375/10=37.5
    docEle.style.fontSize = docEle.clientWidth / 10 + 'px';
  }
  setRemUnit();
  window.addEventListener('resize', setRemUnit);
</script>
